Date:	Tue, 19 Mar 1996 17:27:48 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To:	Mat Hostetter <mat AT ardi DOT com>
Cc:	djgpp-workers AT delorie DOT com
Subject:	Re: `stat' fails to detect nonexistent files under WinNT
In-Reply-To:	<m0tykiM-000GPYC@gwar.ardi.com>
Message-Id:	<Pine.SUN.3.91.960319170939.20848M-100000@is>
Mime-Version:	1.0

On Mon, 18 Mar 1996, Mat Hostetter wrote:

> Here you go.  This is from WinNT 3.51.  Neither badfile nor
> reallylongfilename.will.fail exist.
> 
> C:\tmp>stat 0 badfile reallylongfilename.will.fail
> DOS 5.0 (Microsoft MS-DOS)
> badfile: 2      1 50444 1 42 0 312768000 Fri Nov 30 00:00:00 1979
> Everything checks out OK
> reallylongfilename.will.fail: lossage : No such file or directory (ENOENT)
> Get TrueName call (INT 21h/AX=6000h) failed
> 
> Could this all be explained by Kenji Masaki's idea:
> 
>     I use WinNT 3.51 on NTFS , and gets same result. It seems that
>     WinNT dose not support undocumented DOS call int 21h ax=6000h .

Thanks for the info.  My problem is that for `badfile' it didn't say that
TrueName call failed, so there must be more to it.  The contents of the
stat buffer say that `stat' thinks it's a root directory (the inode is 1,
which it assigns to root directories only).  Root directories fail
`findfirst', so when `findfirst' fails, `stat' has to decide whether it
has a root directory or a non-existent file.  It does so by feeding
`_truename' with a path such as "X:\\" (root directory on the drive in
point) and checking the path that's returned against `canon_path'.  Can
you please try to step through `stat' with a debugger and see why does it
decide it's a root?  The code that detects root directories begins around
line 600 in stat.c. 

Another thing that puzzles me is that `stat' thinks the file is on drive 
C: (the 2 which is printed as the first number on the `stat' output above 
is st_dev, which is drive - 'A').  Is that what DOS box thinks about that 
NTFS drive?  If not, please try to invoke the program with an explicit 
drive letter in the pathname, and see if that makes a difference.

Thanks again for your time.

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